Jun

4

Some remarkable numbers are possible in pumping water without electrical power. While it may not seem important to a developed world’s reader – the ability to reduce fuel use or increase incomes in less developed regions makes great sense. But even a thermal solar kit rigged to a home under floor water heating system with the electricity off could be toasty warm for a whole winter with a minimum of effort.

Mr. Leary’s first try yields a rubbish sourced pump that can achieve a 40-liter per minute flow rate — equal to about four U.S. specification normal showers running, which is more than 10 U.S. gallons. At 26 meters (85.3 feet) of head or lift, a flow rate of 5 liters per minute can be achieved, still more than a gallon.

Mr. Leary created the water-pumping machine using a normal bike, which is mounted into a frame with an old electric pump converted to a friction drive attached to the back wheel. The back tire of the bike makes direct contact with the exposed armature of the motor, which is then covered with rubber from an old tire to give better grip. The machine was tested to a range of heights, with no head or lift making 40 liter per minute flow rate and the reported 26 meters lift making 5 liters per minute. Just like pedaling a bike. It’s a surprise what the human under ¼ horsepower output can accomplish.

The bike-mounting frame can be built quickly and easily using only basic workshop tools and materials, including a few lengths of angle iron, some flat lengths of metal, bicycle seat posts and seat tubes, and a scrapped standard electric centrifugal water pump.

Before Leary´s design became available, Maya Pedal had already produced a popular machine capable of drawing water up from 30 meters (98.4 feet) below the surface. Many Guatemalan farmers work on steep inclines and wanted to distribute the water once it had been extracted from the well. As a result, unlike Maya Pedal´s other static designs, Leary’s pedal pump is completely mobile — when a person is done pumping, they can simply flip the pump frame upside down and it will rest above the back wheel like a bike rack. The mobility enables users to pump from the bottom of the hill to a mid-way tank until full, and then continue pumping from the mid-way tank to the top of the hill. The number of mid-way tanks can be increased indefinitely, effectively making the pumping distance unlimited. Sounds like a bunch of work, but compared to carrying water by the bucket – superbly easy – as one isn’t carrying oneself along during each trip.

The pedal pump is now in regular production in Guatemala and at least six more models have been made since Leary´s departure from the country last summer. Mr. Leary has since produced an open source construction manual for the machine, which is freely available on Maya Pedal´s web site. The manual was recently sent to Malawi by students from the University of Strathclyde involved in a rural irrigation project aiming to address some of the agricultural problems that the developing nation is facing.

Leary said, “When I was asked to design a novel product from waste material for my Master’s thesis, I never would have expected that I’d end up welding together bicycle machines in the highlands of Guatemala! Working at Maya Pedal was like being on Scrapheap Challenge – there is a storeroom full of stripped down bicycle parts, a workshop full of tools and the only limit is your own imagination. There was never a dull day, the volunteers came from all around the world to be there and everyone in the local town was so friendly – it’s certainly an experience I’ll never forget.”

Jon will return to Guatemala in two months or so with a team of three more of the University’s recent graduates from the Department of Mechanical Engineering to design, build and test a wind turbine. The turbine will be designed specifically for Maya Pedal and as a result will be constructed from disused bicycle parts and other scrap materials.

We can join with Dr. Steve Bradbury from the Department of Mechanical Engineering at the University of Sheffield who said: “It is gratifying to see that the design expertise that we foster in our students can be utilized in worthy projects such as this. It is a result where everybody wins; Leary, the University and most importantly, the people of Guatemala.”

The human’s ¼ horsepower isn’t much. But when used effectively a wee bit of energy can go a long way. 10 gallons, two full five gallon buckets in a minute would be 80 pounds – if just moving the water to extract heat – properly put to work human power looks very strong.

Saying many thanks is not going to just be enough, to the phenomenal clarity with your work. I will immediately grab your rss feed to stay advised of any updates. Fabulous performance and a lot good results in your organizations efforts!

Dear sir, I am an undergraduate art student doing a BA/Hons in fine art by negotiated study, at Bournvill universisty Birmingham,
I have recently been asked by a local quarry site, where I have been doing art studies for the past three years, I have been asked to do an instillation, which we have agreed for me to erect a water feature on site which I need some form of human input via a water pump vs pedal power, the instillation is going to be approx 3 meters tall, I would appreciate any input from you to how I could install or make a pedal powered water pump, If you could offer any assistance and need more information regarding my working ideas please contact me on 07799437xxx or via my email Athena55@xxxx.xxx, I would prefer a phone call if at all possible so that I can explain further my ideas. Thank you, I await in anticipation for a reply.
yours Sincerely
Athena Marie Xoufarides

Roxie Divel on
April 4, 2011 11:05 AM

I don’t agree with it, kudos to you for showing the initiative to write it down

Hiya, I am really glad I’ve found this information. Today bloggers publish only about gossip and web stuff and this is actually frustrating. A good site with interesting content, that’s what I need. Thanks for making this site, and I will be visiting again. Do you do newsletters? I Can’t find it.

What are your thoughts about this new hand pump machine? http://wellwaterboy.com/id88.html It operates the same pump cylinder system used for a 12 foot diameter windmill and pumps 6 gallons a minute. No hand pump in the world can do this!

Hi Mr. Leary. I like your invention. Will the bicycle powered water pump work on top of a 3 storey building pumping from a deep well 100 meters away, with curves and corners, and the deep well is 5 meters deep. I will appreciate it so much if you can provide me with an answer.

I am project pedal powering water pump for water storage tank anythining suggestion.
I like your own mindset about thise water pump & i determine that to make exact same water pump.

Lana Jackson on
August 29, 2016 4:01 PM

Appreciated your article and would like the instructions on how to make one of these bicycle water pumps. The portability is also very interesting and useful idea.
Thank you for sharing.

AURA EMMANUEL on
March 5, 2019 10:00 PM

Am a student of kyambogo university also doing that project and am almost finishing it,you can contact or whatsapp me on +256775736548 and going to publish different project designs and research proposals on amazon.com and you can get your copy by typing the word “AURA EMMANUEL”
gracias amigos
hasta luego
adios